<template>
	<div class="list" ref="wrapper">
		<div>
			<div class="area">
				<div class="title border-topbottom">当前城市</div>
				<div class="button-list" >
					<div class="button-wrapper">
						<div class="button">{{this.city}}</div>
					</div>
				</div>
			</div>
			<div class="area">
				<div class="title border-topbottom">热门城市</div>
				<div class="button-list">
					<div class="button-wrapper" 
						 v-for="item of hot" 
						 :key="item.id"
						 @click="handleCityClick(item.name)"
					>
						<div class="button">{{item.name}}</div>
					</div>
				</div>
			</div>
			<div class="area" v-for="(item,key) of cities" :key="key" :ref="key">
				<div class="title border-topbottom">{{key}}</div>
				<div class="item-list">
					<div class="item border-bottom"
						 v-for="innerItem of item" 
						 :key="innerItem.id"
						 v-on:click="handleCityClick(innerItem.name)"
					>
					{{innerItem.name}}
					</div>
				</div>
			</div>
		</div>	
	</div>
</template>

<script>
import Bscroll from 'better-scroll'
import {mapState,mapMutations} from 'vuex'
export default{
  name:'CityList',
  props:{
  	cities:Object,
  	hot:Array,
  	letter:String
  },
  computed:{
  	...mapState(['city'])
  },
  methods: {
  	handleCityClick(city){
  		//this.$store.commit('changeCity',city)
  		this.changeCity(city)
  		this.$router.push('/')
  	},
  	...mapMutations(['changeCity'])

  },
  watch:{
  	letter (){
  		if(this.letter){
  			const element=this.$refs[this.letter][0]
  			this.scroll.scrollToElement(element)
  		}
  	}
  },
   mounted(){
  	this.scroll=new Bscroll(this.$refs.wrapper, { mouseWheel: true, click: true, tap: true })
  }
}
</script>

<style lang="stylus" scoped>
.border-topbottom
    &:before
      border-color: #ccc
    &:after
      border-color: #ccc
  .border-bottom
    &:before
      border-color: #ccc
  .list
    overflow: hidden
    position: absolute
    top: 1.58rem
    left: 0
    right: 0
    bottom: 0
    .title
      line-height: .54rem
      background: #eee
      padding-left: .2rem
      color: #666
      font-size: .26rem
    .button-list
      overflow: hidden
      padding: .1rem .6rem .1rem .1rem
      .button-wrapper
        float: left
        width: 33.33%
        .button
          margin: .1rem
          padding: .1rem 0
          text-align: center
          border: .02rem solid #ccc
          border-radius: .06rem
    .item-list
      .item
        line-height: .76rem
        padding-left: .2rem
</style>